| pilentum | Origin: L. An easy chariot or carriage, used by Roman ladies, and in which the vessels, etc, for sacred rites were carried. Source: Websters Dictionary (01 Mar 1998) |
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| pileorhiza | Origin: NL, fr. Gr. A cap + root. <botany> A cap of cells which covers the growing extremity of a root; a rootcap. Source: Websters Dictionary (01 Mar 1998) |
| pileous | Synonym: hairy. Origin: L. Pilus, hair (05 Mar 2000) |
| pileous gland | A sebaceous gland emptying into the hair follicle. (05 Mar 2000) |
| piles | <medicine> The small, troublesome tumours or swellings about the anus and lower part of the rectum which are technically called haemorrhoids. Origin: The singular pile is sometimes used. Blind piles, haemorrhoids which do not bleed. Origin: L. Pila a ball. Cf. Pill a medicine. Source: Websters Dictionary (01 Mar 1998) |
| pileus | Origin: L, a felt cap. 1. A kind of skull cap of felt. 2. <botany> The expanded upper portion of many of the fungi. See Mushroom. 3. <zoology> The top of the head of a bird, from the bill to the nape. Source: Websters Dictionary (01 Mar 1998) |
| pileworm | <zoology> The teredo. Source: Websters Dictionary (01 Mar 1998) |
| pilewort | <botany> A plant (Ranunculus Ficaria of Linnaeus) whose tuberous roots have been used in poultices as a specific for the piles. Source: Websters Dictionary (01 Mar 1998) |
| pilgarlic | One who has lost his hair by disease; a sneaking fellow, or one who is hardly used. Origin: Etymol. Uncertain. Source: Websters Dictionary (01 Mar 1998) |
| pili | Thread-like structures present on some bacteria. Pili are shorter thanflagella and are used to adhere bacteria to oneanother during mating and to adhere to animal cells. (09 Oct 1997) |
| pili annulati | A rare condition in which the hair shows alternate pigmented and bright segments, the latter due to air cavities within the cortex. Synonym: leukotrichia annularis, pili annulati, thrix annulata, trichonosus versicolor. (05 Mar 2000) |
| pili, sex | Filamentous or elongated proteinaceous structures which extend from the cell surface in gram-negative bacteria that contain certain types of conjugative plasmid. These pili are the organs associated with genetic transfer and have essential roles in conjugation. Normally, only one or a few pili occur on a given donor cell. this preferred use of "pili" refers to the sexual appendage, to be distinguished from bacterial fimbriae (fimbriae, bacterial), also known as common pili, which are usually concerned with adhesion. (12 Dec 1998) |
| pilidium | Origin: NL, fr. Gr, dim. Of a cap. <zoology> The free-swimming, hat-shaped larva of certain nemertean worms. It has no resemblance to its parent, and the young worm develops in its interior. Source: Websters Dictionary (01 Mar 1998) |
| pilifera | <zoology> Same as Mammalia. Origin: NL. See Piliferous. Source: Websters Dictionary (01 Mar 1998) |
| piliferous cyst | A dermoid cyst containing hair. (05 Mar 2000) |